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Re: [Amps] 3CX3000A7 on 144 MHz

Subject: Re: [Amps] 3CX3000A7 on 144 MHz
From: Jim <>
Date: Sun, 9 Feb 2020 06:46:34 -0600
List-post: <>
There is a files are on the amps group on

Jim W7RY

On 2/8/2020 6:55 PM, Conrad PA5Y wrote:
There are several 3CX3000A7s in use on 144 MHz in EU and they are all 
different. They range from 1/2wl striplines or 1/2wl tube over the anode like 
the RX1AS GS35B design to a clone of the W6PO but with a PTFE sandwich on top 
of the anode line instead of CRL blocking caps. The most compact that I have 
seen uses a variant of the G8RWB YC156 2m anode line design with a PTFE 
sandwich. The input is pretty much the same as the W6PO 8877 design on all of 

BTW the YC156 goes well on 2m. Depending on heater transformer availability I 
may use a YC156. Still undecided.

When I have time I will get permission from the owners of the amplifiers and 
maybe put a page up


Conrad PA5Y

-----Original Message-----
From: Amps <> On Behalf Of
Sent: 07 February 2020 17:46
Subject: Re: [Amps] 3CX3000A7 on 144 MHz

I'd like to see a picture of the Plate Circuit on 2 Meters with a 3CX3000.

Don R  W4DNR
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